Battery charger base capable of connecting external AC power

ABSTRACT

The present invention discloses a battery charger base which is a structure having several battery charges stacked with each other and connected to an external AC power. The battery charger base does not occupy an insert hole of a socket, while providing an application of connecting several battery chargers to an external AC power. In the battery charger base, a main body of the charger includes an input plug, a charge rectification circuit, a charge slot, an overload protection circuit and an external AC power socket. The charge circuit is electrically connected to the input plug for inputting an AC power and preventing the circuit from having a load of a large current. The external AC power socket is electrically connected to the overload protection circuit for outputting a stable AC power.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a battery charger base, and moreparticularly to a battery charger that provides an output and a use ofan external AC power.

2. Description of the Related Art

Referring to FIG. 1 for a conventional battery charger 10, the batterycharger 10 installs a charge circuit for inputting AC power to beconverted into DC power, and includes a main body 11 having a pluralityof charging slots 12 for installing and charging chargeable batteries.However, this kind of battery chargers inserted into a power socket forinputting AC power simply provides a function of charging the battery,but it also occupies the position of an insert hole of a socket. Aspresent 3C electronic products become increasingly popular, the demandfor battery power increases drastically and one battery charger cannotmeet the requirements for the expanded power supply.

Therefore, it is an important subject for manufacturers to overcome theforegoing shortcomings of the prior art and develop a battery chargerhaving a charging function and being capable of connecting an externalAC power to output the required power.

SUMMARY OF THE INVENTION

In view of the foregoing shortcomings of the prior art, the inventor ofthe present invention based on years of experience in the relatedindustry to conduct extensive researches and experiments, and finallydeveloped a battery charger in accordance with the present invention toovercome the foregoing shortcomings of the prior art.

The primary objective of the present invention is to provide a batterycharger base capable of connecting an external AC power output, and thedesign of an overload protection circuit and an external AC power socketis added to the original components, not only providing the charging andrectifying functions, but also forming a socket capable of outputting anAC power.

To achieve the foregoing objectives, the present invention provides abattery charger capable of connecting to an external AC power, and thebattery charger comprises a main body, an input plug, a chargerectification circuit, a charge slot, an overload protection circuit andan external AC power socket. The main body is built for containing theinput plug, charge rectification circuit, charge slot, overloadprotection circuit and external AC power socket to provide an insulationprotection. The charge circuit is electrically connected to the inputplug for converting an input of AC power into an output of DC power. Thecharge slot is electrically connected to the charge circuit forinstalling and charging a chargeable battery of an AA or AAAspecification. The overload protection circuit is electrically connectedto the input plug for protecting the input of AC power from having aload of a large current on the circuit. The external AC power socket iselectrically connected to the overload protection circuit for outputtinga stable AC power.

To make it easier for our examiner to understand the objective, shape,structure, apparatus, characteristics and performance of the presentinvention, the following detailed description with reference to theaccompanying drawing of preferred embodiments is given for example, butsuch preferred embodiments are not intended to limit the scope of thepresent invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic view of a prior art battery charger;

FIG. 2 is a schematic view of a battery charger connected to an externalAC power in accordance with the present invention;

FIG. 3 is a schematic view of the connection of related components of abattery charger connected to an external AC power in accordance with thepresent invention;

FIG. 4 is a schematic view of a battery charger connected to an externalAC power in accordance with a preferred embodiment of the presentinvention; and

FIG. 5 is a schematic view of a plurality of battery chargers stackedwith each other and connected to an external AC power in accordance witha preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The description and its accompanied drawings are used for describing apreferred embodiment of the present invention, and it is to beunderstood that the invention is not limited thereto. To the contrary,it is intended to cover various modifications and similar arrangementsand procedures, and the scope of the appended claims therefore should beaccorded the broadest interpretation so as to encompass all suchmodifications and similar arrangements and procedures.

Referring to FIGS. 2 and 3 for schematic views of a battery chargerconnected to an external AC power in accordance with the presentinvention, the battery charger 20 comprises a main body 21, an inputplug 22, a charge circuit 23, a charge slot 24, an overload protectioncircuit 25 and an external AC power socket 26.

The main body 21 is built for containing any of the input plug 22,charge circuit 23, charge slot 24, overload protection circuit 25 andexternal AC power socket 26 to provide an insulation protection for theaforementioned components, and the input plug 22 is provided forinserting a power socket to input AC power, and the charge circuit 23 iselectrically connected to the input plug 22 for inputting AC power to beconverted and rectified into an output of the required DC power, and thecharge slot 24 is electrically connected to the charge circuit 23, suchthat the chargeable battery is installed into the charge slot 24 for abattery charge. In this preferred embodiment, there are a plurality ofcharge slots for installing and charging chargeable batteries of an AAor AAA specification. The quantity of the charge slots 24 adopted inthis embodiment is used for the illustration purpose only, but notintended to limit the invention. Further, the overload protectioncircuit 25 is electrically connected to the input plug 22 for inputtingAC power and preventing a circuit from having a load with a largecurrent, and the external AC power socket 26 is electrically connectedto the overload protection circuit 24 for outputting a stable AC power,and thus the external AC power socket 26 can be connected to a loaddevice that requires an AC power, and prevent an overload of theexternally connected load device. This safety measure can safeguard theload device from an overload of power supply.

In the preferred embodiment as shown in FIG. 4, the battery charger ofthe invention has a feature of connecting an external expanded AC power,such that a load device can be inserted into an external AC power socket26 through a power connector 30 for supplying the required stable ACpower, and thus the battery charger of the invention not only has thefunction of charging a battery, but also connects a socket for anexternal AC power. The present invention does not occupy an insert slotof the socket, when the battery charger is inserted into the powersocket.

In the preferred embodiment as shown in FIG. 5, the battery charger ofthe invention has a feature of connecting an external expanded AC power,and a plurality of battery chargers are stacked with each other toconnect an external AC power without occupying an insert slot of thesocket, while providing an application of connecting several batterychargers to an external AC power supply.

In summation of the description above, the present invention provides abattery charger connected to an external AC power, and the design of anoverload protection circuit and an external AC power socket is added tothe original components, not only providing the charging and rectifyingfunctions, but also forming a socket capable of outputting an AC power.Obviously, the present invention complies with the requirements ofpatent application, and thus is duly filed for patent application.

1. A battery charger base, comprising a main body, an input plug, a charge rectification circuit, and a charge slot, and said charge circuit being electrically coupled to said input plug for converting and rectifying an input of AC power into an output of a required DC power, and said charge slot being electrically coupled to said charge circuit for installing a chargeable battery for performing a battery charge, wherein said battery charger base comprises an overload protection circuit and an external AC power socket, and said overload protection circuit is electrically coupled to said input plug for preventing an input of AC power from having a load of a large current on said circuit, and said external AC power socket is electrically coupled to said overload protection circuit for outputting a stable AC power. 